The details are as follows:
Nickel is a strong sensitizer and can cause allergic reactions if present in articles that come into direct and prolonged contact with the skin. Exposure to lead is harmful for human health and cadmium is harmful to human health, because it accumulates in the body and can damage organs and it may cause cancer.
EU REACH Annex XVII request that nickel release from any post assemblies which are inserted into pierced ears and other pierced parts of the human body less than 0,2 μg/cm²/week and nickel release from the parts of these articles coming into direct and prolonged contact with the skin less than 0,5 μg/cm²/week.
Canada Children's Jewellery Regulations SOR/2018-82 request that Children’s jewellery must not contain more than 90 mg/kg of lead, and not contain more than 130 mg/kg of cadmium if the jewellery item is small enough to be totally enclosed in the small parts cylinder illustrated in the schedule when a force of not more than 4.45 N is applied.
PTS Testing Service suggest relevant enterprises pay close attention to the above information and strengthen quality management to ensure product compliance.